. The anatomy, physiology, morphology and development of the blow- fly (Calliphora erythrocephala), A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author;. Blowflies. THE HEAD AND MOUTH ARMATURE. 45 The Labral Sclerite of the newly-hatched larva (Figs. 7, in, and 9, =>, in) articulates by a pair of processes with the anterior inferior processes of the cephalo-pharynx ; these form the edges of the true mouth. The Great Hooks (Fig. 9, j, //) present three processes : a head which articulates with the hypos
. The anatomy, physiology, morphology and development of the blow- fly (Calliphora erythrocephala), A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author;. Blowflies. THE HEAD AND MOUTH ARMATURE. 45 The Labral Sclerite of the newly-hatched larva (Figs. 7, in, and 9, =>, in) articulates by a pair of processes with the anterior inferior processes of the cephalo-pharynx ; these form the edges of the true mouth. The Great Hooks (Fig. 9, j, //) present three processes : a head which articulates with the hypostomal sclerite, a coronoid process above, which gives insertion to the retractor muscle, and a discal process below, which is adherent to the centre of the stomal disc. In the adult larva a pair of small sclerites are found lying side by side in front of the crossbar of the hypostomal sclerite ; they are the points of inser- tion for the retractor muscles of the Fig. 9. — I, the cephalo-pharynx and mouth armature of a newly-hatched larva ; 2, the mouth armature of the same, seen from its ventral surface ; 3, the same ]5arts from the adult larva seen in profile ; 4, a diagrammatic section through the thickest part of the cephalo-pharynx ; 5, the head capsule of Pcecilostola, after Brauer ; 6, the internal head skeleton of the Cossus larva, after Lyonet—m, median ; //, lateral hooks ; //, pseudo-trachea ; />/, pseudo-labrum and discal sclerites ; x, parasternal y, hypostomal, sclerites ; c/, ciypeus; z' and c", Zopf- grdten or cephalo-pharyngeal processes ; f, lateral plate ; //>//, pharyngeal sinus and muscles of the epipharynx. The pharvnx (Figs. 8 and 9, 4) lies between the inferior processes of the cephalo-pharynx. In transverse section its cavity appears nearly cre- scentic. The concavity of the crescent is filled by the pharyngeal sinus ; its lower wall is formed by a plate developed in the cuticle of the alimentary tube, the hypopharynx. The upper s
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Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1890, bookyear1890
